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Pharmacologic class: Serotonin (5-hydroxytryptamine [5-HT]) receptor agonist
Therapeutic class: Vascular headache suppressant, antimigraine drug
Pregnancy risk category C
Promotes vascular constriction and relieves migraine by stimulating specific 5-HT receptors in intracranial blood vessels and sensory trigeminal nerves
Tablets: 6.25 mg, 12.5 mg
⊘Indications and dosages
➣ Acute migraine
Adults: Single dose of 6.25 to 12.5 mg P.O. at first sign or symptom of migraine; may be repeated after 2 hours. Don't exceed two doses in a 24-hour period.
• Severe renal or hepatic impairment
• Hypersensitivity to drug
• Ischemic heart disease, history of myocardial infarction (MI), documented silent ischemia, symptoms or findings consistent with ischemic heart disease, cerebrovascular accident, uncontrolled hypertension, coronary artery vasospasm
• Ischemic bowel disease
• Basilar or hemiplegic migraine
• MAO inhibitor use in past 14 days
• Use of other 5-HT agonists or ergotamine-containing or ergot-type drugs within past 24 hours
Use cautiously in:
• impaired renal or hepatic function
• cardiovascular risk factors
• pregnant or breastfeeding patients
• children younger than age 18 (use not recommended).
• Give with or without food.
• Wait at least 2 hours after initial dose before giving repeat dose.
• Don't exceed two doses in 24 hours.
☞ Don't give within 14 days of MAO inhibitors or within 24 hours of other 5-HT agonists or ergotamine-containing or ergot-type drugs.
CNS: headache, anxiety, dizziness, fatigue, malaise, weakness, cold or hot sensations, sedation, numbness, burning or tingling sensations
CV: blood pressure changes, palpitations, tachycardia, coronary artery vasospasm, MI, ventricular fibrillation, ventricular tachycardia
EENT: vision changes; nasal, throat, and mouth discomfort
GI: nausea, abdominal distress, dysphagia, dry mouth
Musculoskeletal: weakness, stiff neck, muscle pain
Respiratory: chest tightness or pressure
Skin: sweating, flushing
Drug-drug.CYP2D6 inhibitors (erythromycin, itraconazole, ritonavir): increased almotriptan effect
Ergot derivatives, other 5-HT agonists: prolonged vasoactive action
Ketoconazole and other CYP3A inhibitors: increased almotriptan blood level, leading to toxicity
MAO inhibitors: decreased almotriptan absorption
Selective serotonin reuptake inhibitors: weakness, hyperreflexia, poor coordination
• Assess patient's cardiovascular status, noting chest tightness or pressure.
• Monitor vital signs.
☞ Tell patient to immediately report chest tightness or pressure.
• Inform patient that he may take drug with or without food.
• If second dose is needed, tell patient to take it at least 2 hours after first.
• Caution patient not to take more than two doses in 24 hours.
• Instruct patient to avoid driving and other hazardous activities until he knows how drug affects concentration and alertness.
• As appropriate, review all other significant and life-threatening adverse reactions and interactions, especially those related to the drugs mentioned above.
ClassificationTherapeutic: vascular headache suppressants
Pharmacologic: five ht1 agonists
Time/action profile (Blood levels)
Adverse Reactions/Side Effects
Central nervous system
- coronary artery vasospasm (life-threatening)
- mi (life-threatening)
- ventricular arrhythmias (life-threatening)
- myocardial ischemia
- dry mouth
Drug-Drug interactionConcurrent use with MAO-A inhibitors ↑ blood levels and the risk of adverse reactions (concurrent use or use within 2 wk or MAO inhibitor is contraindicated).Concurrent use with other 5-HT1 agonists or ergot-type compounds (dihydroergotamine ) may result in additive vasoactive properties (avoid use within 24 hr of each other).↑ serotonin levels and serotonin syndrome may occur when used concurrently with SSRI and SNRI antidepressants.Blood levels and effects may be ↑ by ketoconazole, itraconazole, ritonavir, and erythromycin (inhibitors of CYP3A4 enzymes).
Hepatic/Renal ImpairmentOral (Adults) 6.25 mg initially, may repeat in 2 hr; not to exceed 2 doses per 24-hr period.
- Assess pain location, character, intensity, and duration and associated symptoms (photophobia, phonophobia, nausea, vomiting) during migraine attack.
- Assess for serotonin syndrome (mental changes [agitation, hallucinations, coma], autonomic instability [tachycardia, labile BP, hyperthermia], neuromuscular aberations [hyperreflexia, incoordination], and/or GI symptoms [nausea, vomiting, diarrhea]), especially in patients taking other serotonergic drugs (SSRIs, SNRIs).
Potential Nursing DiagnosesAcute pain (Indications)
- Do not confuse Axert with Antivert.
- Oral: Tablets should be swallowed whole with liquid.
- Inform patient that almotriptan should only be used during a migraine attack. It is meant to be used for relief of migraine attacks but not to prevent or reduce the number of attacks.
- Instruct patient to administer almotriptan as soon as symptoms of a migraine attack appear, but it may be administered any time during an attack. If migraine symptoms return, a second dose may be used. Allow at least 2 hr between doses, and do not use more than 2 doses in any 24-hr period.
- If first dose does not relieve headache, additional almotriptan doses are not likely to be effective; notify health care professional.
- Caution patient not to take almotriptan within 24 hr of another vascular headache suppressant.
- Advise patient that lying down in a darkened room following almotriptan administration may further help relieve headache.
- Advise patient to notify health care professional prior to next dose of almotriptan if pain or tightness in the chest occurs during use. If pain is severe or does not subside, notify health care professional immediately. If feelings of tingling, heat, flushing, heaviness, pressure, drowsiness, dizziness, tiredness, or sickness develop discuss with health care professional at next visit.
- May cause dizziness or drowsiness. Caution patient to avoid driving or other activities requiring alertness until response to medication is known.
- Advise patient to avoid alcohol, which aggravates headaches, during almotriptan use.
- Advise patient to notify health care professional of all Rx or OTC medications, vitamins, or herbal products being taken and to consult with health care professional before taking other medications.
- Advise patient to notify health care professional immediately if signs or symptoms of serotonin syndrome occur.
- Caution patient not to use almotriptan if she is pregnant, suspects she is pregnant, plans to become pregnant, or is breast feeding. Adequate contraception should be used during therapy.
- Relief of migraine attack.
AxertA selective serotonin 5-HT1B/1D receptor agonist, which is used for acute management of severe migraine in adults.
Nausea, somnolence, headache, paraesthesia, dry mouth.